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经营范围
发明名称
Mechanically engaged and releasable connection system
摘要
申请公布号
GB2472747(A)
申请公布日期
2011.02.16
申请号
GB20100021202
申请日期
2009.06.05
申请人
NATIONAL OILWELL VARCO, L.P.
发明人
FRED JAGERT;XU SHIJIE
分类号
E21B17/06;E21B23/04
主分类号
E21B17/06
代理机构
代理人
主权项
地址
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